Question

what is the probability that 19 tosses of a fair coin will show 8 heads

Answer 1

i would solve this using proportions:
\[\frac{ 8 }{ 19 } = \frac{x}{100}\]

Answer 2

The value of probability always lies between 0 and 1 @Ibbutibbu.

Answer 3

i know, onece you get the \frac{x}{100} nad find out what x is you can turn it in to a percent

Answer 4

is it 8/38?

Answer 5

in this case x is approximately 42. then .42, which is approximatesly 42% @midhun.madhu1987

Answer 6

but, you may be right

Answer 7

0.0288

0.0721

0.1442

0.2884

these are the options

Answer 8

@midhun.madhu1987 , what do you think?

Answer 9

still thinking.. :)

Answer 10

Hard one, huh?

Answer 11

19C8*(1/2)^8*(1/2)^11... binomial theorem :)

Answer 12

just figured it out... thanks guys